Merge branch 'wip-127192-m501' into MOODLE_501_STABLE

Author: weilai-irl

classes/loginflow/base.php

@@ -755,7 +755,7 @@ protected function get_oidc_username_from_token_claim(jwt $idtoken, string $bind
 
         switch ($bindingusernameclaim) {
             case 'custom':
-                $bindingusernameclaim = get_config('auth_oidc', 'custombindingclaim');
+                $bindingusernameclaim = get_config('auth_oidc', 'customclaimname');
                 // No break.
             case 'preferred_username':
             case 'email':